JP5674114B2 - Light source lighting device and lighting device - Google Patents

Description

  Embodiments described herein relate generally to a light source lighting device that lights a light source so as to be dimmable, and an illumination device including the same.

  Turning on a plurality of types of light sources having different color temperatures and mixing the light outputs to obtain a light output having an intermediate color temperature is called toning, and changing the light output of the light source is called dimming. The light source lighting device can be configured to perform both toning and dimming. By using such a light source lighting device, it is possible to change the color temperature of illumination at high illumination and the color temperature of illumination at low illumination.

JP 2010-129211 A

  However, according to the conventional technology, in a light source lighting device that can perform both toning and dimming, there is no discontinuity that is recognized by humans during toning or toning and dimming. There is a problem that it is not considered to be able to do.

  Embodiments of the present invention enable both toning and dimming, and perform toning and dimming without discontinuities that are recognized by humans during toning or toning and dimming An object of the present invention is to provide a light source lighting device and an illumination device including the same.

According to the embodiment of the present invention, the light source lighting device includes first and second light sources, a lighting circuit, and control means. The second light source has a color temperature lower than that of the first light source and a color temperature of 2500 to 3200K. The lighting circuit lights each of the first and second light sources. The light source lighting device can perform desired color adjustment and light adjustment control, and can also select a fade-out mode. When the fade-out mode is selected, the control means has different lighting control modes for the first light source and the second light source in the preceding stage and the subsequent stage, and the first and second light sources are in the lighting state in the preceding stage of the fade-out mode. It is controlled so as to be synchronized, and is set to be asynchronous in the subsequent stage, and the first light source is first turned off while controlling the light quantity of the second light source to be greater than the light quantity of the first light source in the subsequent stage. Thereafter, the lighting circuit is controlled so that the second light source is turned off.

  According to the embodiment of the present invention, when toning or toning and dimming the illumination including the first and second light sources in the room, the light amount of the second light source is set after the fade-out mode. Since the color temperature of the room illumination light is lowered by increasing the color temperature more than that of the first, it is expected that the color adjustment and the light adjustment can be performed without the discontinuity of the color adjustment and the light adjustment that are recognized by humans. it can.

It is a circuit block diagram of the light source lighting device concerning the 1st Embodiment of this invention. It is a graph which similarly shows the time of the fade mode of 1st and 2nd light source, and the relationship of brightness. It is a graph which shows the relationship of the time and brightness of the fade mode of the 1st and 2nd light source in the 2nd Embodiment of this invention.

[First Embodiment]
A first embodiment will be described with reference to FIG. In the first embodiment, the light source lighting device includes a first light source 1, a second light source 2, a lighting circuit 3, a control means 4, an auxiliary lamp 5 and an auxiliary lamp lighting circuit 6.

  The first light source 1 has a relatively high color temperature of light output, and is, for example, a daylight white color (range 4600 to 5400K) having a correlated color temperature of about 5000K. The color temperature may be obtained by a single light source, or may be obtained by additively mixing the light emitted from a plurality of light sources having different chromaticities. When a predetermined color temperature is obtained using a plurality of light sources, the type may be either the same type or a combination of different types.

  The second light source 2 has a relatively low color temperature of light output, for example, a light bulb color having a correlated color temperature of about 2800K (range 2500-3200K). This color temperature may be obtained by a single light source in the same manner as the first light source 1 or may be obtained by additive mixing of light emitted from a plurality of light sources having different chromaticities.

  The first and second light sources 1 and 2 may be of any kind. For example, any lamp such as a fluorescent lamp, an HID lamp, an LED, an EL (organic or inorganic) lamp, and a field emission lamp may be used. Moreover, the kind may be either the same kind or a combination of different kinds as long as the color temperatures are substantially the same. In the illustrated embodiment, LEDs are used.

  In addition, since the number of the first and second light sources 1 and 2 is not particularly limited, either one or any of a plurality of light sources can be appropriately used. And the number of the 1st light source 1 and the 2nd light source 2 may be equal, and does not need to be equal. In the illustrated embodiment, a plurality of LEDs having the same color temperature are used, for example, connected in series.

  Furthermore, mixed light of various color temperatures can be obtained by mixing the light outputs of the first and second light sources 1 and 2 and changing their mixing ratio. For example, it is possible to obtain illumination light of warm white (range 3200 to 3700K) having a correlated color temperature of about 3500K located between the neutral white color and the light bulb color.

  Since the lighting circuit 3 lights the first and second light sources 1 and 2 individually and in synchronization depending on the lighting mode, the first lighting circuit element 3a is used for the first light source 1. And a second lighting circuit element 3b for the second light source 2, and a common supply of DC power to the first lighting circuit element 3a and the second lighting circuit element 3b. DC power supply 3c is provided.

  The first and second lighting circuit elements 3a and 3b can light the first and second light sources 1 and 2 so as to be capable of continuous dimming. Further, the first and second light sources 1 and 2 are continuously dimmed synchronously under the control of the control means 4 which will be described later. However, it is possible to switch only one or both of them to light up as desired.

  Since the specific circuit system of the lighting circuit 3 is not particularly limited in the present embodiment, an appropriate circuit according to the type of the light source can be employed. When an LED is used as an example of typical light sources 1 and 2, a direct current lighting method is used. The circuit system in this case has advantages such as high circuit efficiency and easy control by adopting a circuit configuration in which a DC-DC converter, for example, a step-down chopper is preferably controlled with constant current.

  The control means 4 can select to turn on at least the first and second light sources 1 and 2 in a fade-out mode in which both the light sources 1 and 2 are synchronized and continuously dim and fade out. When the fade-out mode is selected, the lighting circuit 3 is controlled so that the light amount of the second light source 2 is larger than the light amount of the first light source 1 at the subsequent stage. In this case, the light quantity of the first light source 1 includes a light-off state. The continuous dimming of both the first and second light sources 1 and 2 means that both the light sources 1 and 2 are continuously dimmed under substantially equal light output in the preceding stage or middle stage of the fade-out mode period. means.

  The fade-out mode is a “good night timer” if this is expressed in an easy-to-understand manner. For example, the fade-out mode is a slow dimming operation mode that slowly reduces the illuminance of the room lighting over a period of about 30 minutes to 1 hour to reach the fade-out mode. is there. When this operation mode is introduced, it is possible to reduce ambient illuminance while suppressing a person from feeling uncomfortable.

  In the latter stage of the fade-out mode, the amount of light of the second light source 2 is larger than the amount of light of the first light source 1. For example, in the second half of the fade-out mode period set to about 30 minutes, It means that the light quantity of the light source 2 is larger than that of the first light source 1. After the fade-out mode, the light output of the first and second light sources 1 and 2 will become considerably darker and darker. If you lower the color temperature of such illumination, Since it is said to give a feeling of peace, it is possible to expect the effect of suppressing a person's natural sleep or awakening from a sleep pair.

  The subsequent stage of the fade-out mode is set in proportion to the time of the fade-out mode, and the time may be set to, for example, about 1/3 of the entire time, or constant regardless of the length of the fade-out mode. It is good also as time, for example, about 10 minutes.

  Means for increasing the amount of light of the second light source 2 beyond that of the first light source 1 is not particularly limited in the present embodiment. For example, when the dimming in the fade-out mode proceeds to the latter stage, the light output of the first light source 1 is adjusted to the lower limit of the dimming, for example, the first half of the latter stage before the end of the fade-out mode. The dimming is continuously reduced until it is reduced, and the dimming lower limit is kept constant or the first light source 1 is turned off in the latter half of the time zone. On the other hand, the light output of the second light source 2 is fixedly maintained at a constant level in the first half of the latter stage, dimming from the second half to the end of the fade-out mode, and maintained at the dimming lower limit at the end. Or turn off the second light source 2.

  Next, a description will be given with reference to FIG. FIG. 2 is a graph showing the relationship between the time of the fade-out mode and the brightness in the case of the 30-minute course of the first and second light sources 1 and 2. The time t1 on the horizontal axis is at the start of the fade-out mode, the time t2 is at the start of the latter stage of the fade-out mode, t3 is at the boundary between the first half and the latter half of the latter stage, and t4 is at the end of the latter stage of the fade-out mode. The vertical axis indicates the brightness of the lighting device. When the brightness is 100%, the first and second light sources 1 and 2 share 50% of the light output equally, and the same applies until time t2. The light output decreases linearly at each sharing ratio.

  In FIG. 2, during the normal lighting period from time t0 to t1, the lighting device is in a lighting state in which the output is constant at 100% brightness as shown in the graph L. You can set the brightness level according to your preference. After time t1, a 30 minute fade-out mode is entered. When the lighting device enters the fade-out mode, the first and second light sources 1 and 2 perform continuous light control in synchronization with each other as shown in the graph R, and the light output gradually decreases linearly from 50%. I will do it. At time t2, the second stage consisting of 10 minutes in the fade-out mode is reached. During the above, the light output of the illuminating device exhibits a warm white light color located between the neutral white color and the light bulb color due to mixed light.

  When the fade-out mode enters the first half of the latter stage indicated by the time t2-t4, the first light source 1 has a light output reduction rate that increases as shown by the long dotted line R1 in FIG. After that, the lower limit of dimming is maintained until the end.

  On the other hand, when the fade-out mode enters the latter stage, the second light source 2 has a light output reduction rate of the first light source in the first 5 minutes indicated by time t2-t3 as indicated by a short dotted line R2 in the figure. Is kept at a value smaller than that. Then, in the latter half of 5 minutes indicated by time t3-t4, the reduction rate of the light output increases to the same as that of the lighting device, and reaches the dimming lower limit of about 1% at the termination time t4 of the fade-out mode.

  Therefore, the light output of the solid line indicated by the graph of L in the figure as the lighting device in the latter stage of the fade-out mode indicated by the time t2 to t4 is reduced to the dimming lower limit with the same slope as that in the period before the later stage, and is turned off thereafter. Is done. However, the light output of the illuminating device in the first half of the latter stage of the fade-out mode has a higher light mixture ratio of the light output of the second light source 2, so that the color temperature is lower than before, and when the latter half period of the latter stage, Further, the color temperature is lowered to be equal to the color temperature of the second light source 2.

  The control means 4 is a microcomputer and a DSP (digital signal processor) for facilitating control for obtaining light colors having a desired correlated color temperature by additively mixing the light emitted from the first and second light sources 1 and 2. A digital device such as a signal processor can be mainly configured. In the embodiment shown in FIG. 1, the control means 4 is composed mainly of a microcomputer and is configured to receive a remote control signal RCS. By using the remote control, the user can perform desired toning and dimming by remote control at the user's hand or by operating the operation unit provided on the wall surface, and control operations such as the fade-out mode described above can be easily performed. You can choose.

  In the embodiment shown in FIG. 1, reference numerals IF1 to IF4 denote interface circuits, which are the current feedback interfaces IF1 and IF3 of the first and second lighting circuit elements, and the voltage feedback interfaces IF2 and IF4. Reference sign DSG1 is a drive signal generating circuit for driving the switching element of the first lighting circuit element 3a, and reference sign DSG2 is a drive signal generating circuit for driving the switching element of the second lighting circuit element 3b.

  Next, remote control using a remote controller will be described. The remote controller is means for remotely controlling the lighting device from a remote position, and its specific configuration is not particularly limited, but includes a remote controller and a remote receiver. The remote control is generally a wireless system, but may be a wired system if desired. In the case of a wireless system, infrared communication is generally used as a communication medium, but various known media such as radio waves can also be used as a communication medium.

  The remote controller is a means for controlling the first and second light sources 1 and 2 and the like, for example, at the user's hand, and is operated at a position separated from the illumination device. Further, in the case of dimming, the level can be set so as to be adjustable according to the user's preference, and the fade-out mode can be selected, for example, as a “sleep timer”. For this purpose, the remote controller can be provided with operation switches such as an all-light lighting switch, dimming lighting switch, extinguishing switch, and sleep timer, and an up switch and a down switch for changing the dimming level. .

  The remote control receiver constitutes a part of the control means 4 and is arranged on the side of the lighting device. The remote control receiver receives the remote control signal RCS shown in FIG. 1 modulated by the operation signal transmitted from the remote control operator. Is input to the main body of the control means 4. For this reason, in the case of wireless, the remote control receiver is arranged at a position where at least the receiving unit easily receives the remote control signal of the lighting device, for example, on the lower surface side.

  Further, the remote control receiver can configure the control means 4 so that the light color can be switched as desired. It is configured so that the color temperature of the light output of the lighting device can be selected to a desired value with a single touch, or when the desired light color is obtained by continuously changing the color temperature, the change can be stopped and selected. You can also.

  The auxiliary light 5 is made of an LED. The light emission color of the LED is lit at a color temperature close to that of the second light source, and is, for example, warm yellow. Therefore, the light color difference when the light is turned on following the fade-out mode is reduced, and there is no sense of incongruity.

  The auxiliary lamp lighting circuit 6 operates by obtaining a DC power source from the DC power source 3c provided in the lighting circuits 3 of the first and second light sources 1 and 2, and lights the auxiliary lamp 5. 1 is a drive signal generation circuit supplied to the switching element of the auxiliary lamp lighting circuit 6, and is controlled by the control means 4.

Further, the control means 4 performs the following control for turning on the auxiliary lamp 5. That is, the blinking is selectively controlled each time based on the user's operation. In the fade-out mode, the auxiliary lamp 5 is continuously turned on at the end of the fade-out mode. However, the auxiliary lamp 5 may be switched so as not to be lit if desired.
[Second Embodiment]
A second embodiment will be described with reference to FIG. In the figure, the same parts as those in FIG. In the present embodiment, the dimming modes of the first and second light sources 1 and 2 in the fade-out mode are different from those in the first embodiment.

  That is, the first and second light sources 1 and 2 are continuously lit until reaching the end through the first half and the second half of the latter stage of the fade-out mode, while the light quantity of the second light source 2 is always that of the first light source 2 during that period. Controlled to be more.

  In the second embodiment, there is no sudden change in the color temperature of the light output as the lighting device throughout the entire period of the fade-out mode. That is, the color temperature gradually decreases with a natural feeling after the fade-out mode.

  Next, an embodiment of a lighting device will be described. The illuminating device includes the illuminating device main body and the light source lighting device of the above-described embodiment disposed in the illuminating device main body. In the above, the illumination device is allowed to be various devices including the first and second light sources. The illuminating device main body refers to the remaining part excluding the light source lighting device from the illuminating device. The light source lighting device is the embodiment described above. Moreover, the lighting circuit may be arrange | positioned in the position spaced apart from the illuminating device main body.

  DESCRIPTION OF SYMBOLS 1 ... 1st light source, 2 ... 2nd light source, 3 ... Lighting circuit, 3a ... 1st lighting circuit element, 3b ... 2nd lighting circuit element, 3c ... DC power supply, 4 ... Control means, 5 ... Auxiliary Light, 6 ... Auxiliary light lighting circuit, DSG1, DSG2, DSG3 ... Drive signal generation circuit, IF1, IF2, IF3, IF4 ... Interface, RCS ... Remote control signal

Claims (3)

A first light source comprising LEDs;
A second light source comprising an LED and having a color temperature lower than that of the first light source and a color temperature of 2500 to 3200K;
A lighting circuit for lighting each of the first and second light sources;
A light source lighting device that can perform desired toning and dimming control and can also select a fade-out mode,
When the fade-out mode is selected, the lighting control forms of the first light source and the second light source are different between the preceding stage and the subsequent stage, and the lighting states of the first and second light sources are synchronized with each other before the fade-out mode. In the latter stage, the first light source is first turned off, and then the second light source is controlled so that the light quantity of the second light source is larger than that of the first light source. Control means for controlling the lighting circuit so that the two light sources are turned off ;
A light source lighting device comprising:   2. The light source lighting device according to claim 1, further comprising an auxiliary light that lights at a color temperature closer to the second light source than the first light source after the fade-out mode is executed. A lighting device body;
The light source lighting device according to claim 1 or 2, wherein the light source lighting device is disposed in a lighting device body;
An illumination device comprising:

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